Figure 3.

Bayesian tree using rbcL, including Chlamydomonadalean algae isolated from either snow or polar habitats (except mesophilic outgroup at the bottom). Chlainomonas sp. from the Tyrolean Alps (sample DR67, bold) groups with the two other snow algae of this genus, Cn. rubra and Cn. kolii from North America and New Zealand, respectively. The genus Chlainomonas itself is part of the ‘Chloromonas snow’ clade shown in Remias et al. (2010). Values at the branches indicate Bayesian posterior probabilities (PP) and maximum likelihood bootstrap (BS) values. Asterisks indicate BI PP = 1.00 and ML BS = 100; dashes indicate BI PP < 0.8, and ML BS < 50.